If I was working off the premise of that definition as being correct, I wouldn't have started this thread in the first place. I believe the words "reproductively mature" would more accurately describe what you are suggesting. Unless the female was producing immature eggs, if that is possible. For the purpose of this discussion full size would mean the largest size a certain individual specimen was capable of attaining under optimal conditions. Granted we may never know what that would be, but we can be aware that certain environmental factors or inadequate nutrition may prevent such optical growth from occuring. Are you aware of the word *stunting*? My definition of full size would be a koi that wasn't stunted.
The urban legend states that koi that are allowed to begin breeding at a young age are somewhat stunted as a result. I was trying to find out learn if the legend is false.
Thanks,
Mitch